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02 March 1999 AGE-NC Project No 98-0448 Page 10 of 10 screen Following placement of the filter pack, a surge block will be inserted into the PVC casing and lowered then raised(surged)repeatedly for approximately 10 minutes Thereafter, the depth to the top of the filter pack will be measured and bentomte chips (annular seal) placed above the filter pack and hydrated with clean tap water The remaining annular space will be sealed with portland cement Well construction diagrams are depicted in Figures S 47 SOIL VAPOR EXTRACTION PILOT TEST Following the ground water drawdown test, an SVE pilot test will be performed in order to determine remedial feasibility Soil vapor field parameters and analytical results will facilitate the design of an SVE system and will be used to determine the number of vapor wells, the spacing of wells and the selection of an SVE system An internal combustion(IC) driven engine will be used to apply a vacuum on one of the SVE well screened intervals while the flow from other selected screened intervals are measured The duration of the SVE pilot test will be approximately 8-hours Soil vapor samples will be collected at regular intervals in Tedlar bags and analyzed for TPH-g and BTEX from a state certified laboratory Results of the SVE pilot test will be included in a Corrective Action Plan (CAP) and submitted to PHS- EHD 48 AIR SPARGING PILOT TEST For performance of an in-situ air sparging (IAS)pilot test, a compressor driven unit will be used to infect air into the subsurface via the IAS well The IAS pilot test will be operated for a period of 48- hours (2 days) Several parameters, including air sparging rate, air sparging vapor concentrations, ground water depths and dissolved oxygen will be measured at regular intervals Results of the IAS pilot test will be included in a CAP Advanced GeoEmironmentaa,Inc